| 摘要 |
The present invention relates to a cutting tool comprising a body (1) of sintered cemented carbide or cermet, ceramic or high speed steel on which at least on the functioning parts of the surface of the body, a thin, adherent, hard and wear resistant coating (2) is applied. The coating comprises a laminar, multilayered structure of refractory compounds in polycrystalline, non-repetitive form, MX/NX/MX/NX.... where the alternating layers MX (3) and NX (4) are composed of metalnitrides or carbides with the metal element selected from Ti, Nb, Hf, V, Ta, Mo, Zr, Cr, Al and W and mixtures thereof. The sequence of individual layer thicknesses (5) is essentially aperiodic throughout the entire multilayered structure with layer thicknesses larger than 0.1 nm but smaller than 30 nm. The total thickness of said multilayered coating is larger than 0.5 mu m but smaller than 20 mu m. |
